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18 Μαΐ 2021 · The ability of an atom in a molecule to attract shared electrons is called electronegativity. When two atoms combine, the difference between their electronegativities is an indication of the type of bond that will form.
The difference in electronegativity between two atoms determines how polar a bond will be. In a diatomic molecule with two identical atoms, there is no difference in electronegativity, so the bond is nonpolar or pure covalent.
The electronegativity scale is based on experimental evidence and reflects the relative reactivity of metals and non-metals (i.e. the lowest electronegativity belongs to the most reactive metals, Cs and Fr, while the highest electronegativity belongs to the most reactive non-metal, F).
The difference in electronegativity between two atoms determines how polar a bond will be. In a diatomic molecule with two identical atoms, there is no difference in electronegativity, so the bond is nonpolar or pure covalent.
Objectives. Describe how electronegativity is used to determine bond type. Compare and contrast polar and nonpolar covalent bonds and polar and nonpolar molecules. Generalize about the. characteristics of covalently bonded compounds. Review Vocabulary.
Example 1: Using Electronegativity to Explain Why Water Is a Polar Molecule. A single water molecule consists of two hydrogen atoms and one oxygen atom. Which of the following statements explains why water is a polar molecule? Hydrogen atoms are much smaller than oxygen atoms.
Electronegativity refers to an atoms ability to pull electrons that are shared in a covalent bond to itself. Electronegativity values are shown in the next slide. Bonds are either nonpolar covalent, polar covalent or ionic. Nonpolar covalent bonds occur when two atoms share electrons evenly.
